MOUNTING STRUCTURE FOR ELECTRIC HEATING TUB, ELECTRIC HEATING TUBE TYPE BOILER, AND ELECTRIC STEAM GENERATOR

Description

CROSS-REFERENCE TO RELATED APPLICATION

This non-provisional application claims priority under 35 U.S.C. § 119(a) on Chinese Patent Application No(s). 202411827495.5 filed on Dec. 12, 2024, the entire contents of which are hereby incorporated by reference.

TECHNICAL FIELD

The disclosure relates to the field of electrical devices, in particular to a mounting structure for an electric heating tube, an electric heating tube type boiler, and an electric steam generator.

BACKGROUND ART

An electric heating tube type boiler is a type of boiler commonly used at present, and an electric heating tube is a very important part of the electric heating tube type boiler. The electric heating tube in the electric heating tube type boiler is usually installed on a plate, and its mounting structure is shown in Chinese patent CN209944653U. In the mounting structure shown in this document, a sealing gasket at an end of the electric heating tube which matters in the mounting structure is clamped on a flange (reference numeral 2 in Chinese patent CN209944653U). Because the sealing gasket is clamped on the flange, installation stability of the electric heating tube shown in this structure on the flange is relatively poor.

SUMMARY

In view of above problems, a mounting structure for an electric heating tube is provided in the disclosure.

Technical schemes adopted in the disclosure are as follows.

A mounting structure for an electric heating tube includes a tube plate, an electric heating tube body, a first cylinder part and a second cylinder part. The tube plate is defined with a through hole, the through hole includes a first circular hole part and a conical hole part, the conical hole part is connected with the first circular hole part and a second circular hole part, and a wide-caliber end of the conical hole part is connected with the first circular hole part, and a narrow-caliber end of the conical hole part is connected with the second circular hole part, and the first cylinder part is connected with the second cylinder part, an inner wall surface of the first cylinder part and an inner wall surface of the second cylinder part are located on a same cylindrical surface, and an outer wall surface of the first cylinder part is cylindrical in shape, an outer wall surface of the second cylinder part is frustum-shaped, the outer wall surface of the second cylinder part is configured to be tightly attached to the conical hole part. An outer wall of the first cylinder part is provided with threads, and a hole wall of the first circular hole part is provided with threads. An outer transition ring groove is provided between the outer wall surface of the first cylinder part and the outer wall surface of the second cylinder part, and an inner transition ring groove is provided between an inner wall surface of the first cylinder part and an inner wall surface of the second cylinder part, and the outer transition ring groove and the inner transition ring groove are located in a same plane.

The electric heating tube body is clamped in the first cylinder part and the second cylinder part. When the first cylinder part is screwed into the first circular hole part, the conical hole part squeezes the second cylinder part, and the second cylinder part breaks off from the first cylinder part, and the second cylinder part is squeezed and deformed to clamp the electric heating tube body.

In this mounting structure, the through hole is defined on the tube plate, and the through hole consists of the first circular hole part and the conical hole part. A diameter of a widest end of the conical hole part is smaller than a diameter of the first circular hole part, and thus when the electric heating tube body is mounted, the electric heating tube body is first inserted into the first cylinder part and the second cylinder part, and the electric heating tube body is tightly attached to the inner wall surface of the first cylinder part and the inner wall surface of the second cylinder part, and then the first cylinder part and the second cylinder part are placed into the through hole, and the threads on the outer wall surface of the first cylinder part is matched with the threads on the hole wall of the first circular hole part, and then the first cylinder part is continuously screwed, so that the first cylinder part continuously moves into the first circular hole part, and finally moves until the outer wall surface of the second cylinder part abuts against the hole wall of the conical hole part, and then the first cylinder part is continuously screwed, so that the first cylinder part may break off the second cylinder part due to stress, after which a part of the second cylinder part is located in the conical hole part, and the other part of the second cylinder part is located in the first circular hole part. At this time, the second cylinder part has been squeezed and deformed, and the second cylinder part itself is clamped in the through hole, the second cylinder part clamps the electric heating tube body. The further the first cylinder part moves towards the conical hole part, the tighter the second cylinder part clamps the electric heating tube body.

To sum up, in this mounting structure for the electric heating tube, the through hole consisting of the first circular hole part and the conical hole part is arranged on the tube plate, and the electric heating tube body is clamped and mounted on the tube plate by using a fastener consisting of the first cylinder part and the second cylinder part, the electric heating tube body has good installation stability on the tube plate.

Optionally, the mounting structure for the electric heating tube further includes a clamping part. The clamping part is arranged at an end of the first cylinder part, and the clamping part and the second cylinder part are respectively at two ends of the first cylinder part.

The clamping part is provided to facilitate a wrench and other parts to twist the first cylinder part through the clamping part.

Optionally, the inner transition ring groove is an annular inner transition ring groove.

Optionally, the outer transition ring groove is a triangular outer transition ring groove.

The inner transition ring groove is in an annular form, the outer transition ring groove is in a triangular form, and the inner transition ring groove and the outer transition ring groove are located in a same plane, so that the second cylinder part can quickly break off from the first cylinder part as long as there is stress.

Optionally, there is a gap between the electric heating tube body and a hole wall of the second circular hole part.

When it is necessary to disassemble the electric heating tube body from the tube plate, first, the first cylinder part can be unscrewed from the first circular hole part, then the first cylinder part can be detached from the electric heating tube body, and then the second cylinder part can be pushed to a side of the first circular hole part by an external instrument (including but not limited to a thin steel needle) through the gap, so that the conical hole part can no longer clamp the second cylinder part, thus quickly detaching the electric heating tube body from the tube plate.

An electric heating tube boiler includes the mounting structure for the electric heating tube.

An electric steam generator includes the mounting structure for the electric heating tube.

The disclosure has beneficial effects that the through hole consisting of the first circular hole part and the conical hole part is arranged on the tube plate, and the electric heating tube body is clamped and mounted on the tube plate by using a fastener consisting of the first cylinder part and the second cylinder part, the electric heating tube body has good installation stability on the tube plate.

BRIEF DESCRIPTION OF THE DRAWINGS

In order to more clearly explain technical schemes in embodiments of the present disclosure or in related art, the drawings needed in the embodiments will be briefly introduced below. Obviously, the drawings in the following description are only some of the embodiments recorded in the present disclosure, and other drawings can be obtained according to these drawings for those of ordinary skilled in the art.

FIG. 1 is a schematic structural view of a through hole on a tube plate;

FIG. 2 is a schematic view of a mating relationship between a first cylinder part and a second cylinder part;

FIG. 3 is a schematic view of an mounting structure for the electric heating tube; and

FIG. 4 is an enlarged schematic view at A in FIG. 3.

References numbers in respective figures are as follows: 1. Tube plate; 101. First Circular Hole Part; 102. Conical Hole Part; 103. Second Circular Hole Part; 21. First Cylinder Part; 22. Second Cylinder Part; 23. Clamping Part; 24. Inner Transition Ring Groove; 25. Outer Transition Ring Groove; 3. Electric Heating Tube Body; 4. Ceramic Sleeve; 5. Nut; 6. Tab.

DETAILED DESCRIPTION

In order to make above objects, features and advantages of the present disclosure more obvious and easier to understand, specific embodiments of the present disclosure will be described in detail with reference to the drawings.

In following description, many specific details are set forth in order to fully understand the disclosure, but the disclosure can also be implemented in other ways different from those described here, and those skilled in the art can make similar expansion without departing from connotation of the disclosure, and thus the disclosure is not limited by specific embodiments disclosed below.

In description of this disclosure, it should be noted that terminologies used herein is only for describing specific embodiments and is not intended to limit exemplary embodiments according to this disclosure. For convenience of description, dimensions of various parts shown in the drawings are not drawn according to an actual scale relationship. Techniques, methods and devices known to ordinary skilled in relevant art may not be discussed in detail, but in appropriate cases, the techniques, methods and devices should be regarded as a part of the authorized specification. In all examples shown and discussed herein, any specific value should be interpreted to be illustrative only, but not as limitation. Therefore, other examples of exemplary embodiments may have different values. It should be noted that similar reference numbers and letters indicate similar items in the following figures, and thus once an item is defined in one figure, it is not necessary to be further discussed in the following figures.

Embodiment 1

As shown in FIG. 1, FIG. 2 and FIG. 3, a mounting structure for an electric heating tube includes a tube plate 1, an electric heating tube body 3, a first cylinder part 21 and a second cylinder part 22. The tube plate 1 is defined with a through hole, the through hole includes a first circular hole part 101 and a conical hole part 102, two ends of the conical hole part 102 are respectively connected with the first circular hole part 101 and a second circular hole part 103, and a wide-caliber end of the conical hole part 102 is connected with the first circular hole part 101, and a narrow-caliber end of the conical hole part 102 is connected with the second circular hole part 103, and the first cylinder part 21 is connected with the second cylinder part 22, an inner wall surface of the first cylinder part and an inner wall surface of the second cylinder part are located on a same cylindrical surface, and an outer wall surface of the first cylinder part 21 is cylindrical in shape, an outer wall surface of the second cylinder part 22 is frustum-shaped, the outer wall surface of the second cylinder part 22 is configured to be tightly attached to the conical hole part 102. An outer wall of the first cylinder part 21 is provided with outer threads, and a hole wall of the first circular hole part 101 is provided with inner threads. An outer transition ring groove 25 is provided between the outer wall surface of the first cylinder part 21 and the outer wall surface of the second cylinder part 22, and an inner transition ring groove 24 is provided between an inner wall surface of the first cylinder part 21 and an inner wall surface of the second cylinder part 22, and the outer transition ring groove 24 and the inner transition ring groove 25 are located in a same plane.

The electric heating tube body 3 is clamped in the first cylinder part 21 and the second cylinder part 22. When the first cylinder part 21 is screwed into the first circular hole part 101, the conical hole part 102 squeezes the second cylinder part 22, and the second cylinder part 22 breaks off from the first cylinder part 21, and the second cylinder part 22 is squeezed and deformed to clamp the electric heating tube body 3.

In this mounting structure, the through hole is defined on the tube plate 1, and the through hole consists of the first circular hole part 101, the conical hole part 102 and the second circular hole part 103. A diameter of a widest end of the conical hole part 102 is smaller than a diameter of the first circular hole part 101, and thus when the electric heating tube body 3 is mounted, the electric heating tube body 3 is first inserted into the first cylinder part 21 and the second cylinder part 22, and the electric heating tube body 3 is tightly attached to the inner wall surface of the first cylinder part 21 and the inner wall surface of the second cylinder part 22, and then the first cylinder part 21 and the second cylinder part 22 are placed into the through hole, and the threads on the outer wall surface of the first cylinder part 21 is matched with the threads on the hole wall of the first circular hole part 101, and then the first cylinder part 21 is continuously screwed, so that the first cylinder part 21 continuously moves into the first circular hole part 101, and finally moves until the outer wall surface of the second cylinder part 22 abuts against the hole wall of the conical hole part 102, and then the first cylinder part 21 is continuously screwed, so that the first cylinder part 21 may break off the second cylinder part 22 due to stress, after which a part of the second cylinder part 22 is located in the conical hole part 102, and the other part of the second cylinder part 22 is located in the first circular hole part 101. At this time, the second cylinder part 22 has been squeezed and deformed, and the second cylinder part 22 itself is clamped in the through hole, the second cylinder part 22 clamps the electric heating tube body 3. The further the first cylinder part 21 moves towards the conical hole part 102, the tighter the second cylinder part 22 clamps the electric heating tube body 3. A central axis of the first cylinder part 21 and a central axis of the second cylinder part 22 are in a straight line. An outer diameter of a widest end of the second cylinder part 22 is smaller than an outer diameter of the first cylinder part 21.

To sum up, in this mounting structure for the electric heating tube, the through hole consisting of the first circular hole part 101, the conical hole part 102 and the second circular hole part 103 is arranged on the tube plate 1, and the electric heating tube body 3 is clamped and mounted on the tube plate 1 by using a fastener consisting of the first cylinder part 21 and the second cylinder part 22, the electric heating tube body 3 has good installation stability on the tube plate 1.

In this structure, because the first cylinder part 21 and the second cylinder part 22 are completely connected with each other before installation, they may break off after being completely installed in place, and when the second cylinder part 22 breaks off from the first cylinder part 21, a breaking sound may occur. One of important functions of arranging the inner transition ring groove 24 and the outer transition ring groove 25 is that crisp breaking sound can be generated when breaking occurs, and operators can determine whether the second cylinder part 22 has been installed in place with the breaking sound, so as to avoid over-squeezing the second cylinder part and thus to cause the second cylindrical part 22 to clamp and damage the electric heating tube body 3.

As shown in FIG. 1, FIG. 2 and FIG. 3, the mounting structure for the electric heating tube further includes a clamping part 23. The clamping part 23 is arranged at a end of the first cylinder part 21, and the clamping part 23 and the second cylinder part 22 are respectively at two ends of the first cylinder part 21.

The clamping part 23 is provided to facilitate a wrench and other parts to twist the first cylinder part 21 through the clamping part 23. Specifically, the clamping part 23 can be a hexagonal clamping part 23.

In a specific structure, the clamping part 23, the first cylinder part 21 and the second cylinder part 22 are integrally formed and are integrally cast from a brass material. After casting is completed, the threads, the inner transition ring groove 24 and the outer transition ring groove 25 are formed. The brass material has good rigidity and certain deformability, and can clamp the electric heating tube body 3 and has good corrosion resistance.

As shown in FIG. 1, FIG. 2 and FIG. 3, the inner transition ring groove 24 is an annular inner transition ring groove 24.

As shown in FIG. 1, FIG. 2 and FIG. 3, the outer transition ring groove 25 is a triangular outer transition ring groove 25.

The inner transition ring groove 24 is in an annular form, the outer transition ring groove 25 is in a triangular form, and the inner transition ring groove 24 and the outer transition ring groove 25 are located in a same plane, so that the second cylinder part 22 can quickly break off from the first cylinder part 21 as long as there is stress.

As shown in FIGS. 1, 2 and 3, there is a gap between the electric heating tube body 3 and a hole wall of the second circular hole part 103.

When it is necessary to disassemble the electric heating tube body 3 from the tube plate 1, first, the first cylinder part 21 can be unscrewed from the first circular hole part 101, then the first cylinder part 21 can be detached from the electric heating tube body 3, and then the second cylinder part 22 can be pushed to a side of the first circular hole part 101 by an external instrument (including but not limited to a thin steel needle) through the gap (which is located in the second circular hole part 103), so that the conical hole part 102 can no longer clamp the second cylinder part 22, thus quickly detaching the electric heating tube body 3 from the tube plate 1.

A ceramic sleeve 4 is sleeved on the electric heating tube body 3, and a tab 6 is installed on the electric heating tube body 3 through a nut 5.

Embodiment 2

An electric heating tube boiler is provided, each electric heating tube in this electric heating tube boiler adopts the mounting structure for the electric heating tube as shown in Embodiment 1, and there are a plurality of electric heating tubes, which can be connected in parallel or in series. The electric heating tubes can heat water into steam (that is, a steam boiler) or heat water from low temperature to high temperature (that is, a heating boiler), and an operation voltage of this electric heating tube boiler is 10 kv.

Embodiment 3

An electric steam generator is provided, which adopts electric heating tubes to heat water. There are a plurality of electric heating tubes, and each of the electric heating tube adopts the mounting structure as shown in Embodiment 1. An operation voltage of the electric steam generator is 10 Kv, and generated electric steam can be applied to many occasions (including but not limited to exploitation of crude oil in oil fields).

The above embodiments only express part of embodiments of the present disclosure, and their descriptions are specific and detailed, but they cannot be understood as limiting the scope of the present disclosure. It should be noted that technical solutions recorded in the above embodiments can still modified and part of technical features can be equivalently replaced for those skilled in the art. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of this disclosure shall be encompassed within the protection scope of this disclosure.